pro 785 i think water in crankcase?

after rebuilding the carbs and putting new reed petals in that were cracked, I got the pro to fire up,
but before I went too far I hooked the hose up to the water line, the best way I could because I had my pump off, ski ran good on the hose, water was coming out the pissers and out the exit tube off the head,

went to start it up this week and it seemed to be blowing water out the carburetors,

i took the head off and i have water on tops of the pistons,not much but if I crank it over it sprays water droplets out,
i think when i did the hose rig some how water got thru the exhaust and into the pistons,

pistons look good still,
how do i get the water out of the crank case?

I fogged inside the cylinder walls real good and cranked it for a little bit, and when I wiped the oil off the top of the pistons this is what I found,
mag piston has a little burn spot on the top,
so now the choice, put in the set of weisco pistons i already have or just buy one piston for the front??